47 votes
Accepted

Why is the UH-60 tail rotor canted?

John K and Koyovis's answers are both correct. However, as a former pilot of the UH-60 and a mechanical engineer here is a simpler version. A helicopter must be balanced. If the front is much ...
Philip's user avatar
  • 486
26 votes

Why is the UH-60 tail rotor canted?

A guy in my glider club used to fly them. It's something to do with achieving a vertical lift component of several hundred pounds from the tail rotor's thrust, and that and the large horizontal tail ...
John K's user avatar
  • 131k
23 votes

Why is the UH-60 tail rotor canted?

I came across this in Ray Prouty's book, Helicopter Performance, Stability and Control. The best position for the centre of gravity on a single rotor helicopter is slightly ahead of the main rotor ...
Koyovis's user avatar
  • 61.7k
10 votes

Why would a helicopter hold a 'nose-up' in hover?

1) The 60 has a natural nose up, left wing down hover attitude. I want to say 3, and 1.5 degrees, but I'm going off memory. Given the angle of the shot, I would venture to say that it's more optical ...
Tom's user avatar
  • 101
10 votes

Can the MH-60 helicopter fly without one or all of the stabilators?

Assuming there is no STC ("Supplemental Type Certificate") that addresses this as an existing modification, the answer, in terms of acceptable aircraft airworthiness, is a hard no. "Can the aircraft ...
Alpinwolf's user avatar
  • 493
10 votes

How is it safe for helicopters and Ospreys to refuel in mid-air?

When fully extended the probe does extend past the rotor of the HH-60G; however, there is a potential for the probe not to extend. And in that case, the probe is well inside the rotor disc. Still, ...
Fudd's user avatar
  • 101
5 votes
Accepted

What is the bend in the tip of the blade of the new Black Hawk?

It is blade sweep, used to delay compressibility effects at the rotor blade tip. From Leishman: The blade tips encounter the highest dynamic pressure and highest Mach numbers and strong trailed tip ...
Koyovis's user avatar
  • 61.7k
5 votes

Can the MH-60 helicopter fly without one or all of the stabilators?

This has happened. The aircraft was landed (as soon as possible) for a good reason. Both of these cases address partial failure. Complete loss of stab I have no knowledge of. The RH failure ...
KorvinStarmast's user avatar
4 votes

What is the relationship between the UH60 Blackhawk stabilator function lateral sideslip and pitch coupling?

The sideslip to pitch coupling is a result of the canted tail rotor and the asymmetry of the main rotor downwash. The tail rotor thrust pushes the tail to the right and upward (pitch down). The main ...
Gerry's user avatar
  • 19.8k
2 votes

Can the MH-60 helicopter fly without one or all of the stabilators?

All modern day helicopters have horizontal stabilisers to provide static stability. The main rotor and the fuselage both have an inherent negative stability derivative in pitch. The MH-60 stabilator ...
Koyovis's user avatar
  • 61.7k
2 votes

Why is the UH-60 tail rotor canted?

The stabilator has a decided effect on effective lift with the tail rotor. It has a large range of travel, both up and down. This travel combined with the tail rotor thrust augmented by the 20 degree ...
Kevin Cogan's user avatar
1 vote

Why is the UH-60 tail rotor canted?

Gordon Galow the original designer of the helicopter for the US army now 98 years old said it was for the lift. Even at the small percentage angle of the blade it provided some lift. One of the most ...
Craig Galow's user avatar
1 vote

Why would a helicopter hold a 'nose-up' in hover?

When in forward flight, the rotor will be pitched down to convert some of the lift vector into forward motion. This also results in the fuselage of the helicopter pitching down. Therefore the fuselage ...
Greg Taylor's user avatar
  • 3,791

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